Intracellular Lipid Levels and Oxidative Stress in Peripheral Blood Mononuclear Cells in Experimental Type 1 Diabetes Mellitus.

Type 1 diabetes mellitus was modeled in Wistar rats by intraperitoneal injection of streptozotocin (25 mg/kg for 5 days), which led to the appearance of the main symptoms of insulin-dependent diabetes. In peripheral blood mononuclear cells isolated by centrifugation on a Ficoll density gradient, the production of ROS and the level of intracellular lipids were evaluated by flow cytofluorimetry. In rats with type 1 diabetes mellitus, an increase in ROS levels in isolated peripheral blood monocytes, but not in the lymphocytic fraction was revealed. Incubation of isolated monocytes in a medium containing 1 mM oleic acid led to a 1.5-fold increase of intracellular lipid levels. After incubation of the lymphocyte fraction in this medium, no differences from the control were revealed. Disorders of carbohydrate and lipid metabolism in type 1 diabetes mellitus leading to an increase of free fatty acids and ROS levels can be detected ex vivo in isolated peripheral blood mononuclear cells.

Insulin Resistance in Experimental Type 1 Diabetes Mellitus.

Experimental type 1 diabetes mellitus (T1DM) was induced in rats by daily intraperitoneal injections of alloxan in a dose of 90 mg/kg for 4 days. For verification of insulin resistance, insulin tolerance test was performed in 2 weeks and the glucose utilization rate constant (KITT) was calculated. The rats demonstrated the main symptoms of T1DM: hypoinsulinemia, hyperglycemia, ketonemia, glucosuria, ketonuria, polydipsia, polyphagia, weight loss, and insulin resistance, as evidenced by a decrease in KITT. The serum content of free fatty acids and triacylglycerols significantly increased. The content of triacylglycerols increased in skeletal muscles and decreased in the liver. A negative linear correlation was found between KITT and triacylglycerol content in muscles. Thus, the development of insulin resistance in experimental T1DM in rats is associated with accumulation of triacylglycerols in skeletal muscles.

[Eating behavior and skills of premature children in different age periods].

Premature infant feeding often causes a number of difficulties not only during the nursing of a baby in the neonatal period, but also in further periods of the formation of nutritional skills and habits. Eating difficulties are noticeable not only during the first year of life. The further development of the eating behavior of premature children differs from fullterm peers. The aim of the publication is to demonstrate the peculiarities of eating skills and eating behavior in premature infants throughout the entire period of childhood. Material and methods. The search for original studies and systematic reviews that evaluated eating skills or eating behavior in children and adolescents born prematurely at various age periods was carried out using the eLIBRARY.ru and PubMed databases. Results. Children with a gestation period of less than 32 weeks at birth are most vulnerable to the development of eating disorders, since the suck-swallow-breath pattern is in the process of maturation. Eating difficulties are noticeable during the first year of life, since the formation of eating behavior is closely related to the development of motor skills and the neurodevelopment. The proportion of premature children experiencing nutritional difficulties decreases with age, but does not become comparable with that among full-term peers. Later with time, motor disorders are replaced by selective appetite, and tendencies to eating disorders are formed. In addition, with age, gender differences in eating behavior appear, which are characterized by an increase in eating disorders among boys. Conclusion. Currently, the data demonstrating characteristic age patterns in children born prematurely have been accumulated. Such a long-term effect of premature birth on eating behavior dictates the need for close attention to this group of children among pediatricians and the development of specialized programs for monitoring of preterm children.

Comparative Evaluation of ß-Catenin and E-Cadherin Expression in Liquid Aspiration Biopsy Specimens of Thyroid Nodules.

We compared the results of gene molecular and immunocytochemical studies of ß-catenin and E-cadherin in different variants of nodular thyroid disease (nodular colloid goiter, follicular thyroid adenocarcinoma, papillary thyroid cancer) and revealed changes of the function of the E-cadherin/ß-catenin complex leading to switching from adhesion function of ß-catenin in nodular colloid goiter to predominantly transcriptional activity in papillary carcinoma. The results confirm the important role of disturbances in E-cadherin-ß-catenin interactions in the mechanisms of malignant transformation of follicular epithelium.

[The technique of fluid cytology in diagnostic of thyroid diseases].

The increasing of number of diseases of thyroid actualizes searching for new solutions in differential diagnostic. Nowadays, the technique of fluid cytology is started to be applied under cytological analysis of puncture sample of thyroid. However, experience of application of technique of fluid cytology in interpretation of cytological sample is limited. The article presents results of analysis of samples of fine needle aspiration biopsy of thyroid from 126 patients. In case of traditional cytological analysis aspirate was putted on glass right away. In case of technique of fluid cytology patient was re-punctured and sample was placed into vial with preservative solution. At re-puncture increasing number of analysis with non-diagnosed samples was observed (40.6% in comparison with 17.8% under traditional cytological analysis). However, in 50% of patients with non-informative samples in traditional cytological analysis implementation of technique of fluid cytology permitted to establish proper diagnosis. In diagnostic of non-tumor affections of thyroid the best results demonstrated by technique of fluid cytology (86.6% as compared with 47.2% under technique of fluid cytology). However, in diagnostic of benign tumor affections of thyroid the best accuracy was demonstrated by traditional cytological analysis (61.1% as compared with 33.3% of technique of fluid cytology). Both techniques demonstrated similar results in category of malignant affections of thyroid. The diagnosis of cancer or suspicion to cancer was established in 85.7% of cases under technique of fluid cytology and in 82.7% of cases under traditional cytological analysis). The analysis of cytological pictures of various diseases of thyroid in technique of fluid cytology demonstrated specifics and differences from traditional cytology that are to be considered. At the same time, observations convincingly testify that in number of cases traditional and fluid techniques supplement each other. Besides, technique of fluid cytology permits preserving and transport puncture samples and in case of necessity to apply additional clarifying diagnostic techniques that in turn increases effectiveness of cytological diagnostic of affections of thyroid.

[Promising markers for the risk and prognosis of gestational diabetes mellitus]. / Perspektivnye markery riska razvitiia i prognoza techeniia gestatsionnogo sakharnogo diabeta.

The review provides information on the molecular genetic mechanisms for the development gestational diabetes mellitus (GDM). It gives data on the genetic identity of GDM and type 2 diabetes mellitus and considers a role of some adipokines and incretin hormones in the development of GDM. There is evidence for the role of magnesium and vitamin D deficiencies in the pathogenesis of gestational carbohydrate metabolic disturbances.

[ß-Catenin: Structure, Function and Role in Malignant Transformation of Epithelial Cells].

The article presents the data on the structure and mechanisms of ß-catenin functioning. The basic aspects of the role of ß-catenin in malignant transformation have been studied at various tumors. Primary structure of ß-catenin allows it to interact with many factors and ligands, including transcription factors, α-catenin, cadherin, Axin, Rho family GTPases, Bcl9 et al. This interaction is the base for ß-catenin's intracellular multi-functioning. The review presents data on the participation of ß-catenin in the mechanisms of adhesion, regulation of RNA metabolism, formation contacts with the cytoskeleton and its role in the canonical Wnt signaling pathway, marked examples pro-inflammatory and anti-inflammatory effects of ß-catenin. The ß-catenin involvement in malignant transformation and progression of certain tumors is not in doubt. The data on the changes in ß-catenin expression in the given examples of colon cancer, prostate cancer, different forms of thyroid cancer and hepatocellular carcinoma are presented with the prospects of its use as a marker and a predictor of malignant transformation. Continued research in this area will not only make use of ß-catenin as a potential predictor of malignant tumors, but also to develop approaches to targeted therapy.

[Effects of strontium ranelate on mononuclear leukocyte culture].

Strontium ranelate (SR) effect on the functional parameters of human blood mononuclear leukocytes culture has been investigated. SR in concentrations of 2.9, 29, and 290 mg/ml produces a dose-dependent decrease in the activity of alkaline phosphatase and the content of calcium and potassium ions in supernatants. In concentrations of 2.9 and 29 mg/ml, SR decreases, while in a concentration of 290 mg/ml it increases the intercellular phosphate ion content. Fibroblast- and osteoblast-like cells, which are capable of regulating mineral compound of intercellular liquid, are SR cellular targets in human blood mononuclear leukocytes culture.